If a hybrid had a chamber of say 100ci, then you would need 16ci for a 4x mix (approx)?
So for a propane metre would you use a larger one than for a combustion or would you increase the pressure?
So you would put in a 4x the amount of propane needed in a regualer combustion then pump it up to 44.1PSI?

0

If your getting chased off a police dog, try not to run through a tunnel then onto a small see-saw then through a ring of fire. They are trained for that!

Lucy,
I use the method you just described. I have a pressure gauge in my meter pipe. I turn on the valve from the propane tank, wait for 38 PSI in the meter (the correct pressure for a 4.2% propane mix in my chamber), close the first valve, and then open the second one to vent the gas in the meter into the chamber. Works fine for me. You just have to close the first valve quickly, when the gauge reaches the correct pressure.

However, my setup is on a combustion, not a hybrid. I'm designing a steel hybrid which I intend to build early next year, though.

If I were you, I would use a stun gun. The bbq sparker won't have too big of a spark under pressure (I think). You might as well pay a few dollars more and get a stun gun for a much more reliable ignition.

Propane liquifis at 90 PSI You should use a low pressure meter with a large pipe. Get the 10 Bar Reg as then you can use it for the air as well. You ajust the Reg by turning the large knob on the top.
No Name: 1 Bar = 14.7 PSI=1 Atmosphere.